$ volta --version
Updating your Volta directory. This may take a few moments...
1.0.5
$ RUST_BACKTRACE=1 volta -h | false
thread 'main' panicked at 'Error writing Error to stdout: Os { code: 32, kind: BrokenPipe, message: "Broken pipe" }', /Users/brew/Library/Caches/Homebrew/cargo_cache/registry/src/github.com-1ecc6299db9ec823/clap-2.33.0/src/errors.rs:401:55
stack backtrace:
   0: _rust_begin_unwind
   1: core::panicking::panic_fmt
   2: core::result::unwrap_failed
   3: core::result::Result<T,E>::expect
   4: clap::errors::Error::exit
   5: clap::app::App::get_matches_from::{{closure}}
   6: clap::app::App::get_matches
   7: volta::main
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.